<span>Among important crop plants, nitrogen-fixing root nodules are most commonly an attribute of
B) legumes</span>
Answer:
c.all atoms have the same arrangement for electrons
Answer:
mixture of atoms forms molecule
The moles of CaCO3 which are there in antacid tablet that contain 0.515g CaCO3 is calculated as follows
moles =mass/molar mass
the molar mass of CaCO3 = ( 40 x1)+ (12 x 1) + (16 x 3)= 100 g/mol
moles is therefore= 0.515g/100 g/mol= 5.15 x10^-3 moles
FeBr2
1*z + 2*(-1) = 0
z = 2 is the o<span>xidation state of each element in FeBr2</span>
